AutoCodes – Generic – B1838

B1838 Code - Short to Positive in Curtain Shield Squib Left Circuit

Quick Answer

The Curtain Shield Squib Left (LH) Circuit consists of the Center Airbag Sensor Assembly and the Curtain Shield Airbag Assembly Left (LH). Common causes include Faulty Curtain Shield Airbag Assembly Left (LH) (Curtain Shield Squib Left), Curtain Shield Airbag Assembly Left harness is open or shorted, Curtain Shield Airbag Assembly Left circuit poor electrical connection. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

What it means: B1838 indicates Short to Positive in Curtain Shield Squib Left Circuit.
Common causes: Common causes include Faulty Curtain Shield Airbag Assembly Left (LH) (Curtain Shield Squib Left), Curtain Shield Airbag Assembly Left harness is open or shorted, Curtain Shield Airbag Assembly Left circuit poor electrical connection.
Severity: High - diagnose this code as soon as possible.
Can I drive?: Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.

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Code Popularity 8,134

How popular is this code, among other codes? Low

Repair Importance Level

Urgent (Diagnose now) (3 / 3)

Repair Difficulty Level

Advanced (Pro) (3 / 3)

What is this?

Table of contents Created and updated by William Orellana on Dec 02, 2022

Description
Possible Causes
How To Fix
Cost to Diagnose
FAQs
Comments
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Code B1838 Description

The Curtain Shield Squib Left (LH) Circuit consists of the Center Airbag Sensor Assembly and the Curtain Shield Airbag Assembly Left (LH). The circuit signals the Supplemental Restraint System (SRS) to deploy when deployment conditions are met. The Diagnostic Trouble Code (DTC) is recorded when a malfunction is detected in the Curtain Shield Squib Left Circuit.

OBDII Code B1838 - Short to Positive in Curtain Shield Squib Left Circuit - AutoCodes.com — B1838 Code - Short to Positive in Curtain Shield Squib Left Circuit

What does this mean?

What are the Possible Causes of the DTC B1838?

Faulty Curtain Shield Airbag Assembly Left (LH) (Curtain Shield Squib Left)
Curtain Shield Airbag Assembly Left harness is open or shorted
Curtain Shield Airbag Assembly Left circuit poor electrical connection
Faulty Center Airbag Sensor Assembly

How to Fix the DTC B1838?

Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.

What is the Cost to Diagnose the Code?

Labor: 1.0

To diagnose the B1838 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.

Need more information about the B1838 code?

Need more information on how to fix the B1838 code? Get Access to Factory Service Manuals

Need Help with the Code?

Get the B1838 code diagnosed by a professional: Find a repair shop in your area

Information for Specific Makes

B1838 Lexus — Short to Positive in Curtain Shield Squib Left Circuit
B1838 Scion — Short to Positive in Curtain Shield Squib Left Circuit
B1838 Toyota — Short to Positive in Curtain Shield Squib Left Circuit

Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.

Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

Frequently Asked Questions about B1838 Code

1. What are the common symptoms of OBDII code B1838?

- Common symptoms include the airbag warning light illuminating on the dashboard and potential failure of the left curtain shield airbag system.

2. What can cause the OBDII code B1838 to appear?

- This code is typically triggered by a short to positive in the curtain shield squib left circuit, which may be caused by wiring issues, faulty components, or water damage.

3. How serious is the OBDII code B1838?

- The code indicates a fault in the left curtain shield airbag system, which can compromise the effectiveness of the airbag in the event of a collision. It is important to address this issue promptly.

4. Can I still drive my vehicle with the OBDII code B1838 present?

- It is not recommended to drive the vehicle with this code active, as the left curtain shield airbag may not deploy correctly in an accident. Get the issue diagnosed and repaired as soon as possible.

5. How can I diagnose and repair OBDII code B1838?

- Diagnosis involves inspecting the wiring and components in the curtain shield left circuit for any damage or shorts. Repair may involve repairing or replacing damaged wiring, connectors, or the curtain shield squib itself.

6. Are there any DIY tips for troubleshooting OBDII code B1838?

- While basic troubleshooting like checking for loose connections or visible damage can be done by DIY enthusiasts, it is recommended to seek professional help for a comprehensive diagnosis and repair.

7. How much does it cost to fix OBDII code B1838?

- The cost of fixing this issue can vary depending on the extent of the damage, the need for replacement parts, and labor costs. It is advisable to get estimates from reputable mechanics or dealerships.

8. Can resetting the OBDII code B1838 make it go away permanently?

- Simply resetting the code without addressing the underlying issue will not make it go away permanently. The problem causing the code needs to be diagnosed and repaired to prevent it from reoccurring.

9. Is OBDII code B1838 a common issue in certain vehicle models?

- This code may be more common in vehicles equipped with curtain shield airbags, but its occurrence can still vary across different makes and models. Checking with a manufacturer or dealership for any known issues is advisable.

10. Can OBDII code B1838 affect the overall safety of the vehicle?

- Yes, OBDII code B1838 can affect the overall safety of the vehicle, specifically in terms of the proper functioning of the left curtain shield airbag system. It is crucial to address this issue promptly to ensure the safety of occupants in case of an accident.